html,
body {
    height: 100%;
    width: 100%;
    background-color: #f6f6f6;
}

* {
    margin: 0;
    padding: 0;
}

img {
    display: block;
}

a,
a:visited,
a:link,
a:active {
    color: #000;
    text-decoration: none;
}